package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpSession;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.constants.RedisConstants.*;
import static com.hmdp.constants.SystemConstants.USER_NICK_NAME_PREFIX;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Slf4j
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
    @Autowired
    StringRedisTemplate stringRedisTemplate;
    @Override
    public Result sendCode(String phone, HttpSession session) {
        // 1、手机号校验
        if(RegexUtils.isPhoneInvalid(phone)) {
            return Result.fail("手机号格式错误！");
        }
        // 2、生成随机验证码
        String code = RandomUtil.randomNumbers(6);
        // 3、保存验证码到Redis
        String key = LOGIN_CODE_KEY +  phone;
        stringRedisTemplate.opsForValue().set(key, code, LOGIN_CODE_TTL, TimeUnit.MINUTES);
        // 4、发送验证码到手机（未实现）
        log.debug("发送的验证码为："+ code);
        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        String phone = loginForm.getPhone();
        // 1、校验手机号
        if(RegexUtils.isPhoneInvalid(phone))
            return Result.fail("手机号格式错误！");
        // 2、校验验证码是否一致
        String validCode  = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY+phone);
        String loginCode = loginForm.getCode();
        if(!StringUtils.equals(loginCode,validCode)){
            return Result.fail("验证码错误");
        }
        // 3、查询用户状态，不存在则重新注册
        User user = query().eq("phone", phone).one();
        if(user==null){
             user = createUserByPhone(phone);
        }
        // 4、保存用户到Redis (隐藏敏感信息，采用DTO形式）
        String token = UUID.randomUUID().toString();
        UserDTO userdto =  BeanUtil.copyProperties(user, UserDTO.class);
//        Map<String, Object> userMap = BeanUtil.beanToMap(userdto); //这里long还是long，保存到redis中会出错
        final Map<String, Object> userMap = BeanUtil.beanToMap(userdto, new HashMap<>(),
                CopyOptions.create().setIgnoreNullValue(true).setFieldValueEditor(
                        (fieldName, fieldValue)->{return fieldValue.toString();}
                )
        );
        stringRedisTemplate.opsForHash().putAll(LOGIN_USER_KEY+token, userMap);
        stringRedisTemplate.expire(LOGIN_USER_KEY+token, LOGIN_USER_TTL, TimeUnit.MINUTES);
        // 5、返回token
        return Result.ok(token);
    }

    private User createUserByPhone(String phone) {
        User user = new User();
        user.setPhone(phone);
        user.setNickName(USER_NICK_NAME_PREFIX+ RandomUtil.randomString(10));
        save(user);
        return user;
    }
}
